Salvadora persica (Arak, Galenia asiatica, Meswak, Peelu, Pīlu, Salvadora indica, or toothbrush tree, mustard tree, mustard bush), is a species of Salvadora. Salvadora persica has antiurolithiatic properties. Used for centuries as a natural toothbrush, its fibrous branches have been promoted by the World Health Organization for oral hygiene use. Research suggests that it contains a number of medically beneficial properties including abrasives, antiseptics, astringent, detergents, enzyme inhibitors, and fluoride. Native to: Algeria, Angola, Cameroon, Chad, Egypt, Eritrea, Ethiopia, India, Iran, Israel, Jordan, Kenya, Libya, Malawi, Mali, Mauritania, Mozambique, Niger, Nigeria, Oman, Pakistan, Palestine, Saudi Arabia, Senegal, Somalia, South Africa, Sri Lanka, Sudan, Syria, Tanzania, Uganda, Yemen, Zambia, Zimbabwe Also occurs in Namibia.